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Homeowner's Guide to Double Glazing

Did you know that up to 30% of a home’s heating energy can be lost through single-glazed windows? In the quest for a more comfortable and energy-efficient home, double glazing emerges as a beacon of innovation. Originally crafted to combat the harsh winters of northern Europe, this technology has warmly settled into Australian homes, proving its worth far beyond mere insulation. Double glazing, with its dual panes of glass and insulating gas layer, offers a multifaceted solution to energy loss, noise pollution, and more. Let’s explore how upgrading to double-glazing can transform your living space into a bastion of comfort and efficiency.

What is Double Glazing

Double glazing might sound complex, but at its core, it’s a simple yet effective concept. It consists of two glass panes that are separated by a space filled with air or an inert gas, such as argon. This assembly is then sealed within a frame, which can be made from various materials, including uPVC, wood, or aluminium. The innovation doesn’t stop at just adding an extra pane of glass; the space between the panes is what truly makes double glazing effective in insulating homes.

The Difference from Single Glazing

Single glazed windows use just one pane of glass and are significantly less efficient at insulating against temperature and noise. In contrast, double glazing creates a barrier that significantly reduces the transfer of heat and sound. During winter, the interior pane retains warmth within the home, while the exterior pane acts as a shield against the cold outside air. Conversely, in the summer months, double glazing helps keep the heat out, maintaining a cooler indoor environment without over-reliance on air conditioning.

Components of Double Glazed Windows

  • Glass Panes: The type of glass can vary, including options like low-emissivity (low-E) glass, which has a special coating to reflect thermal radiation.
  • The Gap: The space between the glass panes is crucial. Filled with air or gases like argon or krypton, it provides the window’s insulating properties. The width of this gap is typically between 6mm to 20mm, with optimal insulation often found around 12mm.
  • Frame Material: The frame plays a significant role in the overall performance of double-glazed windows. Materials like uPVC offer excellent thermal insulation, durability, and low maintenance, while timber frames provide a classic aesthetic and natural insulation. Aluminium frames, known for their strength, can also include a thermal break to improve insulation.
Double Glazed window diagram

The Benefits of Double Glazing

Double glazing is not just a home improvement; it’s a transformative investment that significantly enhances the comfort, efficiency, and value of your living space. Below are the key benefits that double glazing offers to homeowners:

Benefit Explanation Impact
Reduced energy bills Double glazing insulates your home better, so you'll use less heating and cooling energy. Save money on your energy bills
Increased comfort Double glazing reduces noise pollution and drafts, making your home more comfortable. Create a more peaceful and enjoyable living environment
Increased property value Double glazing is a desirable feature for homebuyers, so it can increase the value of your property. Potentially sell your home for a higher price
Reduced environmental impact Double glazing helps reduce your carbon footprint by using less energy. Help protect the environment

Double glazing offers a clear path to a more comfortable, efficient, and valuable home. By choosing to upgrade, you’re not just improving your living environment; you’re also making a smart financial and environmental decision.

Expert Tips - Reasons to Upgrade:

  • Lower Energy Bills: They significantly improve insulation, cutting down on heating and cooling costs.
  • Soundproofing: These windows offer excellent soundproofing, ensuring a quieter home.
  • Home Upgrades: Ideal for renovations, they boost both the thermal efficiency and the look of your home to increase it’s value.
  • Eco-Friendly: Upgrading to double-glazed windows is a solid step towards living more sustainably by reducing energy consumption.

What to Look For

Selecting the right double-glazed windows involves several key considerations:

  • Glass Types: Look for low-E or tinted glass options that offer additional benefits, such as enhanced thermal efficiency and UV protection.
  • Frame Materials: Choose materials that complement your home’s design and meet your needs in terms of durability, maintenance, and thermal performance.
  • Spacer Bars: These separate the two panes of glass and can be made of various materials, including aluminum or composite materials that reduce heat loss.
  • Professional Installation: Ensure that the window installation or replacement is performed by experienced glaziers to guarantee optimal performance and longevity.

Installation Process Overview

The process of installing double-glazed windows is straightforward when handled by licensed glaziers. It typically involves:

  • Removing the old window units.
  • Preparing the opening for the new double-glazed units.
  • Installing the new windows, ensuring a perfect fit and seal.
  • Finishing touches, such as sealing and trimming, to enhance aesthetics and performance.

Homeowners are often concerned about the disruption this process might entail. However, professional installers work efficiently to minimize inconvenience, ensuring a smooth transition to your new, improved windows.


In conclusion, double glazing offers more than just enhanced home insulation; it’s a step towards a more sustainable, comfortable, and peaceful living environment. By significantly reducing energy bills, dampening external noise, and increasing your home’s value, double-glazing stands out as a smart investment for Australian homeowners.

Ready to transform your home with double glazing? Get a FREE window assessment now!
Picture of Khalil Chahine
Khalil Chahine

Khalil is the owner of Splendid Window Glass Repairs and has over 8 years experience as a glazier specialising in window glass repair, replacement and installations. Khalil takes great pride in his work and prides himself on providing an excellent service to all of his customers, no matter how big or small the job may be.